When should a patch test be performed relative to a chemical texture service?

• A. 24-48 hours prior to the service.
• B. Immediately before the service.
• C. One week after the service.
• D. Two hours prior to the service.

Answer: (A)

Patch testing before a chemical texture service is a safety check to see if the client may react to the ingredients in the product. Because some allergic reactions can take time to appear, the test is done 24 to 48 hours before the service so you can observe any signs like redness, itching, or swelling. If a reaction occurs, the service should not proceed. Doing the test too close to the appointment or after the service wouldn’t protect the client, and waiting a week would miss the opportunity to catch a reaction before exposure.

To perform it, apply a small amount of the product (as it will be used) to a tiny skin area, such as behind the ear or on the inside of the forearm, then monitor for 24–48 hours. If no reaction develops, the client can proceed with the service. This test is a standard safety step, especially when using a new product or when the client has sensitive skin or a history of allergies.